A T.B. Of Production Enginerring

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drives, multi-speed squirrel cage induction motors and shunt wound DC. motors
are used. ... speeds are changed by the engagement of mechanical, electro-
magnetic or hydraulic friction clutches, variable speed transmission etc. ... A
standard 3 phase motor with a fixed number of pair of poles drives a 3 phase A.C.
generator with variable number of pair of poles. ... The various stepped speeds in
a DC. motor can be obtained by : (i) by changing the voltage drop in the armature
circuit.

Title

:

A T.B. Of Production Enginerring

Author

:

P. C. Sharma

Publisher

:

- 1999-01-01

ISBN-13

:

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